Contoured 3 piece design for a comfortable fit.... Patella free opening with a stitched in butress which gives extra support to the patella.... Cut out area helps deliver the optimum amount of pressure to the patella.... Restricts movement of the patella.... Helps to relieve the pain of patella symptoms, unstable medial/lateral ligaments and cartilage damage.... Measure around mid-section of the knee while in a standing position.... XS=26-30cm... S=30-35cm... M=35-40cm... L=40-45cm... XL=45-50cm... ...Products in the Vulkan support range are of slightly higher quality than in the LP support range, hence the difference in price…